code: def fields(self) -> Dict[str, Any]:
      return self._fields
  
file_path: wandb/wandb/viz.py
imports: from typing import Any, Dict, Optional, Tuple
  from wandb.data_types import Table
  from wandb.errors import Error
label_desc: Use image node_id 6 for calling the CustomChart obj's underlying member method code with example usage: obj.fields() and returns: self